Hartford BO 1444(60) Alternatives Presentation Meeting Town Highway - PowerPoint PPT Presentation

Hartford BO 1444(60) Alternatives Presentation Meeting Town Highway 6 – Bridge #7 over The White River and Town Highway 98 May 7, 2019

Introductions Laura Stone, P.E. VTrans Scoping Engineer Todd Sumner, P.E. VTrans Project Manager

Purpose of Meeting  Provide an understanding of our approach to the project  Provide an overview of project constraints  Discuss our recommended alternative  Provide an opportunity to ask questions and voice concerns

Location Map

Bridge 7 Project Location

Meeting Overview  VTrans Project Development Process  Project Overview – Existing Conditions – Alternatives Considered – Recommended Alternative  Maintenance of Traffic  Schedule  Summary  Questions

VTrans Project Development Process Initiated Project Project Contract Funded Defined Award Project Project Design Construction Definition  Quantify areas of  Identify resources & impact constraints  Environmental  Evaluate alternatives permits  Public participation  Develop plans,  Build Consensus estimate and specifications  Right-of-Way process if necessary

Who are you representing? A. Municipal Official B. Resident C. Emergency Services D. Local Business E. Independent Organization F. Press G. Other

How often do you use this segment of VA Cutoff Road? A. Daily B. Weekly C. Monthly D. Rarely E. Never

How often do you walk over the bridge? A. Daily B. Weekly C. Monthly D. Rarely E. Never

How often do you bike over the bridge? A. Daily B. Weekly C. Monthly D. Rarely E. Never

What is your reason for attending this meeting? A. Specific concern B. General Interest C. Live in close vicinity D. Other

Description of Terms Used

Looking North over Bridge Existing Conditions – Bridge #7  Roadway Classification – Local Road (Class 2 TH)  Bridge Type – 559’ Long 4-Span Steel Deck Truss  Ownership – Town of Hartford  Constructed in 1929, Reconstructed in 1973

Looking South over Bridge Existing Conditions – Bridge #7  Existing Typical Section: 11’/0’ – Minimum standard is 11’/4’  Sidewalk on Bridge

Existing Conditions – Bridge #7  Bridge is structurally deficient due to superstructure condition  The rocker bearings are over extended and have heavy rusting  The bridge joints are in poor condition  Substructure is in Satisfactory condition, with some maintenance needs: – Backwalls: The reinforced concrete backwalls have heavy cracking and staining. – Abutment 2 has cracking and staining and wingwalls have moderate map cracking. – Piers: The bridge seats have areas of cracking and spalling. Pier footings have heavy spalling throughout.  The deck is in satisfactory condition, with some maintenance needs: – The curbs have heavy map cracking. – The sidewalks have heavy map cracking and small delaminations. – Both the upstream and downstream fascias have cracking and staining. – The soffit of the reinforced concrete deck has cracking and staining with efflorescence throughout in random locations.  The bridge and roadway approaches are too narrow for the speed and traffic volumes present.

Superstructure Deterioration Existing Conditions - Bridge #7  Deck Rating 6 (Satisfactory)  Superstructure Rating 4 (Poor)  Substructure Rating 5 (Fair)

Substructure Existing Conditions - Bridge #7

Substructure Existing Conditions - Bridge #7

Bearings Existing Conditions - Bridge #7

Resources – Looking Upstream Existing Conditions - Bridge #7  Utilities – Aerial and attached to bridge  Historic Resources Bridge No. 7, four historic buildings on Maple Street, and a former – Hartford Woolen Mill warehouse

Historic Metal Truss Bridge Preservation Plan Existing Conditions - Bridge #7  The standardized Warren deck-truss of Bridge No. 7 was the largest span constructed in Vermont as part a statewide flood recovery campaign after 1927.  Permitting Requirements – Federal funding requires that rehabilitation is considered first. – A replacement can only be considered if there is no feasible or prudent rehabilitation alternative that meets the Purpose and Need of the project.

Hazardous Waste

Existing Conditions

Design Criteria and Considerations Traffic Data 2021 2041 AADT 3,900 4,300 DHV 480 530 ADTT 130 180 %T 2.2 2.9  Design Speed of 35 mph  Aerial Utilities  Water line attached to bridge  Historic Resources  Railroad Crossing – 400’ south of the bridge on VA Cuttoff Road – Sufficiency Rating: 51 (below threshold of 60)

Alternatives Considered – Bridge #7  No Action – Additional maintenance required within 10 years  Deck Replacement with Superstructure Rehabilitation – Structural deficiencies would be addressed – Truss rehabilitation – Substructure rehabilitation – Match existing Typical with a sidewalk, or widen shoulders and eliminate sidewalk • 5.5’ sidewalk – 0’ – 11’ – 11’ – 0’ • 2’ – 11’ – 11’ – 2’ (No Sidewalk) – 30 year design life  Full Bridge Replacement On or Off Alignment – Widen to match the minimum standard typical with a sidewalk • 5.5’ sidewalk – 4’ – 11’ – 11’ – 4’ – 100 year design life

Recommended Alternative - Bridge #7  Full Bridge Replacement – Town has stressed that a wider bridge is needed – Reduced Future Maintenance Costs – New bridge typical section: 5.5’ sidewalk – 4’ – 11’ – 11’ – 4’ – 100 year design life

Typical Section – Existing vs Proposed

On Alignment Layout Full Replacement On Alignment - Bridge #7  11’/4’ typical with 5.5’ sidewalk, 100 year design life  Minor ROW Needed  Number of spans to be determined in design  Eligible for 5% Town share with a closure during construction per ACT 153 of the 2012 legislative session

Off Alignment Layout Full Replacement Off Alignment Option 1  11’/4’ typical with 5.5’ sidewalk, 100 year design life  ROW Needed  Number of spans to be determined in design  Not eligible for 50% reduction in funding per ACT 153 – Town share increases from 5% to 10%

Off Alignment Layout Full Replacement Off Alignment Option 2  11’/4’ typical with 5.5’ sidewalk, 100 year design life  Significant ROW Needed  Number of spans to be determined in design  Not eligible for 50% reduction in funding per ACT 153 – Town share increases from 5% to 10%

Profile

Maintenance of Traffic Options Considered  Offsite Detour  Temporary Bridge  Existing Bridge for Off-Alignment Option  Existing Bridge is too narrow for phased construction

Road Closure  Detour chosen and signed by Town  Shortest route is 3.0 miles end-to-end  1 year closure

Traffic Control – Offsite Detour  VA Cutoff Road, to Vermont Route 14, Hartford Ave, North Main Street, Woodstock Road, and Town Highway 32, back to VA Cutoff Road  3.0 mi end-to-end

Temporary Bridge  Two Lane Temporary Bridge either Upstream or Downstream

Temporary Bridge Layout Temporary Bridge  Downstream Temporary Bridge  Not eligible for 50% reduction in funding per ACT 153 – Town share increases from 5% to 10%

Recommended Scope  Full Bridge Replacement On-Alignment with Traffic Maintained on an Offsite Detour – Widen to meet the minimum standards • New bridge typical section: 5.5’ sidewalk – 4’ – 11’ – 11’ – 4’ – 100 year design life with reduced future maintenance costs – 1 year closure – Right of Way needed – Aerial and municipal utility relocation is needed – Potential Hazardous Waste

Alternatives Matrix Alternative 1 Alternative 2 Deck Replacement with Superstructure and Substructure Rehabilitation Full Bridge Replacement No Sidewalk Sidewalk No Sidewalk Sidewalk Hartford BO 1444(60 ) 3. OFF Alignment – b. Temporary a. Offsite Detour b. Temporary Bridge a. Offsite Detour Traffic Maintained Bridge on Existing Bridge 8,080,546 8,262,306 10,151,625 10,326,985 11,760,159 14,521,866 14,414,026 Total Project Costs 269,352 275,410 338,387 344,233 117,602 145,219 144,140 Annualized Costs 202,014 206,558 507,581 516,349 588,008 1,452,187 1,441,403 Town Share 2.50% 2.50% 5% 5% 5% 10% 10% Town % 4 years 4 years 4 years 4 years 4 years 4 years 5 years Project Development Duration 8 months 8 months 18 months 18 months 18 months 18 months 18 months Construction Duration Closure Duration (If 6 months N/A N/A 1 year N/A N/A Applicable) 0‐11‐11‐0 with 0‐11‐11‐0 with 5.5’ 2‐11‐11‐2 2‐11‐11‐2 4‐11‐11‐4 with 5.5’ sidewalk 5.5’ sidewalk sidewalk Typical Section ‐ Bridge (feet) Substandard Width Meets Minimum Criteria Geometric Design Criteria Alignment Change No No No No No No Yes Bicycle Access Improved No Change Improved No Change Improved Improved Improved Sidewalk Sidewalk No Change No Change Improved Improved Improved Removed Removed Pedestrian Access ROW Acquisition Yes Yes Yes Yes Yes Yes Yes Road Closure Yes Yes No No Yes No No Design Life 30 30 30 30 100 100 100

Preliminary Project Schedule  Construction Start – 2023 – Total Cost Estimate: $11,760,159 • Town Share: $588,008